Audio speaker



FIG. 1 is a front elevational view of an audio speaker showing my new design.

FIG. 2 is a rear elevational view thereof.

FIG. 3 is a right-side elevational view thereof.

FIG. 4 is a left-side elevational view thereof.

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

I claim the ornamental design for an audio speaker, as shown and described. 